Who this book is for

This book is for developers who want a deeper understanding of OpenJDK and want to start making changes. This could be someone who has some cool ideas and wants to contribute or who has found a bug that is tempting to fix. Also it will provide a good starting point to people who want to make changes to the existing VM, for some reason. This could be for research or tailoring VM for specific needs, like special hardware or some very specific requirements.

Overall, it will be useful to anyone who wants to simply have look inside OpenJDK, see what it is, and how it works.